Directly From the Porter Cable Owners Manual
MAINTENANCE
To reduce the risk of injury, turn unit off and disconnect it from power source before
installing and removing accessories, before adjusting or when making repairs. An accidental startup can cause injury.
LUBRICATION
This tool has been lubricated with a sufficient amount of high grade lubricant for the life of the unit under normal operating conditions. No further lubrication is necessary.
BRUSH INSPECTION
For your continued safety and electrical protection, brush inspection and replacement on this tool should ONLY be performed by a PORTER-CABLE FACTORY SERVICE CENTER OR PORTER-CABLE AUTHORIZED WARRANTY SERVICE CENTER.
At approximately 100 hours of use, take or send your tool to your nearest PORTER-CABLE Factory Service center or PORTER-CABLE Authorized Warranty Service Center to be thoroughly cleaned and inspected. Have worn parts replaced and lubricated with fresh lubricant. Have new brushes installed, and test the tool for performance.
Any loss of power before the above maintenance check may indicate the need for immediate servicing of your tool. DO NOT CONTINUE TO OPERATE TOOL UNDER THIS CONDITION. If proper operating voltage is present, return your tool to the service station for immediate service.